Tool-holder for tool and like grinding machines.



2 SHEETSASHEET 1.

Patented Dec. 17, 1912.

T. LUMSDEN.

APPLICATION FILED FEB.8, 1911.

TOOL HOLDER POR TOOL AND LIKE GRINDING MACHINES.

I NVENToR.

BY al WITN sis:

T. LUMSDEN.

TOOL HOLDER FOR TOOL AND LIKE GRINDING MACHINES. APPLICATION FILED rEB.a,1911.

. 1,047,424, Patented Dec. 17, 191.2.

2 SHEETS-SHEET 2.

NVENTOB @M BY WITNESS THOMAS LUMSDEN, 0F GATESHEAD, ENGLAND.

TOOL-HOLDER FOB. TOOL AND LIKE GBINDING MACHINES.

Speoication of Letters `Patent.

Patented Dec. 17, 1912.

Application tiled February 8, 1 911. Serial No. 607,364.

To all whom it may comern:

Be it known that I, THOMAS LUMsDEN, a Sub'ect of the Kin of Great Britain and Irelland, and a resi ent of Gateshead, 1n the county of Durham, England, have invented certain new and useful I mlprovements 1n Tool-Holders for Tool and ike Grindlng Machines, of which the following is a speelcation.

This invention relates to tool holders for machines for grinding the tools of lathes, Blotting, shaping, planlng and like machlnes, and has for its object to provide an 1mroved holder which will secure the tool rmly' during the -nding or sharpenmg o ration, and whic will be readily adjustale to suit di'erent sizes and angular aces of tools. U

I will fully describe my invention wlth reference to the accompanying' drawings wherein- Figure 1 is a side elevation of my improved tool holder, Fig. 2 a longitudinal sect-ion of same, and Fig. 3 a plan of Fig. 1. Fi 4 is a front view, Fig. 5 a rear view, and Fig. 6 a rear'view part-ly in section. Fig. 7 is an enlarged rear view of the main part of the holder, and Fig. 8 a section on the line X-Y therein. Figs. 9 and 10 are part sectional views illustrating an adjustable stop for setting and re-setting the tool holder to various positions as hereinafter described, Fig. 11 is an enlarged part front view of the main part of the holder, and 12 is a sectional plan of same on the line/Z-Z.

Referring to the drawings a is a frame or disk mounted and angularly adjustable within a carrier b articulated at c to a turntable d which is mounted and angularly adjustable on a compound slide (not shown) 1n the known way.

e is an opening in the frame or disk a, and f is an adjustable bracket for supporting the front end of the tool to be ground and having a dove-tail guide gV (Figs. 3 and 4) sliding in a corr ondin roove It in a projection j on the ront o e frame or disk a.. The bracket f is retained in the desired position by a spring-pressed catch lc engaging ratchet teeth m on the guide g, said catch being ada ted to be retracted from engagement wit the teeth m by a trig n to allow of the adjustment of the brac et f. The rear end of the frame or disk a is furnished with a trough-like extension o, the side walls of which are rovided with two series of holes p-p at di erent levels for the rece tion of pins which form an adjusta le support for the rear end of the tool.

The front end of the tool is clamped in position on the bracket f by screw clamps r, s carried by a saddle t sliding on a guide u on the front face of the frame or disk a and ada ted to he retained in the desired position y a bolt lv having a head w (Fig. 12) engaging the guide u. The clampin screw r bears against the side of the too?, and the clampin screw s is arranged at an angle and furnis ed with a head :c having a V-shaped notch y (Fi 11) for engaglng the corners of rectangu ar tools as shown in Figs. 3 and 4. The head w is secured to the clamping screw 8 by a ball universal-joint z so that the head may be capable of limited movement relatively to the screw and so adjust or adapt itself should the saddle t not be adjusted to uite the correct position.

The rear end of t e tool is clamped in position on the pins g, q by a clamp lcomprising a bridle 2 having notches 3 for engaging flanges 4 on the side walls of the trough-like extension o and a'clamping screw 5. The bridle 2 is furnished with several notches 3 for the purpose of rendering it. adjustable to various sizes of tools.

When a cranked tool is to be placed in the holder the bracket f and pins g, y are ad'- justed to suit the front and rear ends of the tool, and on the latter bein placed in position on the bracket f and plns g, q the front and rear ends are clamped by the screw clamps r and s and the bridle 2 and clamping screw 5 as above described and shown in Figs. 1 to 5. When a straight or uncranked tool is to be placed in the holder the bracket f and pins g, g are adjusted to the same heights or levels and the tool is placed in position thereon and secured as described.

In order to hold tools at various angles for the purpose of grinding angular faces, the frame or disk a is angularly adjustable within the carriage b. For adjusting the frame or disk a at right angles within the carrier b the latter is furnished with a spring-pressed plunger 6 adapted to engage recesses -7-7 (Figs. 7 and 8) provided in the periphery of the frame .or disk a at intervals of 90, and when adjusted the frame or disk is locked by the plunger 6 and a clamping screw 8. For adjusting the frame or disk a at other angles than right angles the carrier b is provided at the rear with a protractor or scale 9 and the frame or disk a with a mark 10. To adjust the frame or disk a the latter is rotated until the mark 10 coincides with the required an le on the scale or prot-ractor 9 and then c amped by the screw 8'.

To enable the frame or disk a, after being adjusted to any angle other than a right angle, to be moved fro-m such angle and readily readjusted or brought back to same, spring plungers 11, 11 are provided on the carrier b and are adapted to coact with adjustable stops 12--12 mounted on bolts ,13-13 having dovetail heads 14 (Figs. 9 and 10) sliding in a complementary groove 15 in the frame or disk a.. After the frame or disk a has been adjusted to the required an le, one ofthe stops 12 is adjusted into a inement with one of the plungers 11 as shown in Fig. 6. The plunger engages a recess 16 in the stop which is then locked by its bolt 13, and on the frame or disk being adjusted to some other angle it can be readily brought back to its former angle by rotating it until the stop aforesaid comes into alinement with and is engaged by the plunger. By providing more than one plunger 11 and several stops 12 the frame or disk a can after being adjusted to several diii'erent angles be readily re-adjusted to any of them.

In order to hold the spring plungers 6 and 11, 11 in the in-operative position I combine with the head of each, as shown in Figs. 7, 8, 9 and 10, a stem 17 which, when the plunger is in action asses through a hole in the head. When t e plunger is retracted it can be held out of action by rotating it so that the hole in the head is moved out of alinement with the stem 17 which then retains the pluh er in its retracted position as shown in i 10.

For clamping the carrier b w en adjusted about its pivot c the carrier is furnished with a screwed projection 18 passing through a slotted quadrant plate 19 and provided with a clamping nut 20. The adjustment of the carrier about its pivot o may be limited by pins 21, 22 adapted to engage blocks 23, 24 adjustable in slots 25, 26 in the quadrant plate 19 as shown in Figs. 1, 4, 5 and 6.

What I claim and desire to secure by Letters Patent.is

1. In tool holders for tool and like grinding machines the combination of a carrier, a rame or disk mounted in said carrier and angularly adjustable therein, an adjustable bracket mounted and sliding on the front face of said frame or disk, means for adjusting said bracket and locking it in the adjusted position, and means for clamping the tool thereon.` l

2. 1n i901 holders for tool and like grinding machines the combination of a carrier, a frame or disk mounted in said carrier and angularly adjustable therein, an adjustable` bracket mounted and sliding on the front' face of said frame or disk, a spring-pressed catch for adjusting'said bracket and ocking it in the adjusted position, and a trigger for releasing said catch. l

3. In tool holders for tool and like grinding machines the combination with an adjustable support for the tool and means for adjusting said support and locking it in the adjusted position, of an adjustable saddle, means for adjusting said saddle and locking it in the adjusted position, and screw clamps on said saddle for clamping the tool on said support. j

4. In tool holders for tool and like grinding machines 'the combination with a support for the tool of an ad'ustable saddle, means for adjusting said sa dle and locking it in the adjusted position, and screw clamps on said saddle for clamping the tool on said support, one of said clamps being arranged obliquely or at an angle and furnished with a V-shaped clamping head attachedl by a universal joint.

5. In tool holders for tool and like grindin machines the combination of a carri/er, a rame or disk mounted in said carrier and angularly adjustable therein, an adjustable support mounted on said frame or disk for supporting the front end of the tool, means for adjusting said support, an ad'ustable saddle mounted and slldin on the iront of said frame or disk, means or adjusting said saddle and locking it in the adjusted position, and screw clamps on said saddle for clamping the tool on said support.

6. In tool holders for tools and like grinding machines the combination of a carrier, a frame or disk mounted in said carrier and angularly adjustable therein, bracket mounted and sliding on sai frame or disk, means for locking said bracket in the adjusted position, an adjustable saddle mounted and sliding on said frame or disk, and screw clamps on said saddle one of said screw clamps being arranged obliquely or at an angle and furnished with a clamping head attached by a universal joint and provided with a V-shaped notch.`

7. In tool holders for tool and like grindin machines the combination of a carrier, a rame or disk mounted in said carrier and angularly adjusted therein, a. support on and at one side of said frame or disk for supporting the front end of the tool, an adjustable support on and at the other side of said frame or disk for supporting the rear end of the tool, and means for clamping the tool on said su orts.

8. In tool hol) ers for tool and like grinding machines the combination of a carrier,

an ad 'ustable a frame or disk mounted in said carrier and angularly adjustable therein, an adjustable support on and at one side of said frame or disk for sup orting the front end of the tool, means or clamping the tool thereon, an adjustable support on and at the other side of said frame or disk for supporting the rearend of the tool, and means for clamping the tool thereon.

9. In tool holders for tool and like grinding machines the combination of a carrier a rame or disk mounted in said carrier and angularly adjustable therein, a support on and at one side of said frame or disk for supporting the rear end of the tool, and adjustable support on and at the other side of said frame ordisk for supporting the front end of the tool, and means for clamping the tool on said supports.

10. ln tool holders for tool and like grinding machines the combination of a carrier,

ame or disk mounted in said carrier and angularly adjustable therein and provided with an opening, an adjustable support on one side of said frame or disk, means for clamping one end of the tool on said support, a trough-like extension on\the other side of said frame or disk, graduated holes in the sides or Walls of said extension, pins adapted to be inserted in said holes and to support the other end of the tool, and means for clamping the tool on said pins.

l1. In tool holders for tool and like grindin machines the combination of a carrier, a trame or disk mounted in said carrier and angularly adjustable therein and provided with an opening, an adjustable bracket mounted and sliding on one side of said frame or disk, means for clamping one end of the tool on said bracket, a trough-like extension on the other side of said frame or disk, graduated holes in the sides or walls of said extension, pins adapted to be inserted in said holes and to support the other end of the tool, and means for clamping the tool on said pins.

12. In tool holders for tool and like grinding machines the combination of a carrier, a r

ame or disk mounted in said carrier and angularly adjustable therein and provided with an openin an adjustable bracket mounted and sliin on one side of said frame or disk, an a justable saddle mounted and slidin on said frame or disk, scxew clamps on sa d'le for clamping one end of the tool on said bracket, a trough-like extension on the Yother side of said frame or angularly adjustable therein, a trou h-like extension on said frame or disk, gra uated holes in the Walls or sides of said extension, pins adapted to be inserted in said holes and to support the tool, and a clamping device for clam ing the tool in position on said pins, sai clamping device comprising an adjustable bridle provided with notches to engage projections on said extension and a clamping screw mounted in said bridle.

14, in tool holders for tool and like grinding machines the combination of a carrier, a frame or disk mounted in said carrier and angularly adjustable therein, an opening in said frame or disk, an adjustable bracket .mounted and sliding on one side of said frame or disk, means for locking said bracket, an adjustable saddle mounted and sliding on said traine or disk, means for locking said saddle, screw clamps carried by said saddie, a trough-like extension on the other side of said frame or disk, holes in the side Walls oi' said extension, pins adapted to be inserted in said holes, and an adjustable clamp comprising an adjustable bridle adapted to engage said extension and a clamping screw mounted in said bridle.

l5. in tool holders for tool and like grindin machines the combination of a carrier, a graine or disk mounted in said carrier and singularly adjustable thereing and opening in said frame or disk, an adjustable support on each side of said frame or disk, a spring plunger on said carrier ada ted to co-act 'With recesses arranged at de nite angles in said frame or disk, spring nlungers on said carrier, and stops mounte and angular-ly adjustable on sald frame or disk and adapted to co-act with said s ring plungersn ln Witness whereof l ave hereunto si ned my name in the presence of two subscri `lng Witnesses.

THOMAS LUMSDEN.

Witnesses:

EDMUND WAnD PA'rnsoN,

Hnaannr Howaan. 

